The AM2301B is an affordable enclosed temperature and humidity sensor featuring an I2C interface — a modern upgrade over the classic DHT22/AM2302 sensors that required bit-bang timing protocols. Inside is the proven AHT20 sensor, delivering reliable readings over standard I2C with support for 2.5V to 5.5V power, making it compatible with both 3.3V and 5V microcontrollers.

With built-in pull-up resistors and a wired enclosed housing, this sensor is ready to connect directly to any Arduino or Raspberry Pi. Take readings as often as you like with no timing-critical protocol to worry about — just simple I2C communication.

Key Features

• I2C Interface – Standard I2C communication, no bit-bang timing protocol needed
• Wide Voltage Range – 2.5V to 5.5V, compatible with 3.3V and 5V logic
• Built-In Pull-Ups – Ready to connect with no external resistors required
• Enclosed Wired Design – Protected sensor in a compact housing with lead wires
• AHT20 Sensor Inside – Proven, reliable temperature and humidity sensing

Specifications

• Sensor – AHT20
• Interface – I2C (single address)
• Supply Voltage – 2.5V to 5.5V
• Humidity Accuracy – ±2% RH (typical, at 20–80% RH)
• Temperature Accuracy – ±0.3°C (typical, at 20–60°C)
• Housing – Non-waterproof wired enclosed shell

Ideal For

• IoT environmental monitoring
• Home automation and climate control
• Weather stations and data logging
• Arduino, Raspberry Pi, and CircuitPython projects

Package Contents

• 1× AM2301B Wired Enclosed Temperature and Humidity Sensor

Resources

• Adafruit AHT20 Guide (library code, datasheet, and more)